STARTUP SOURCE INVERTER
First Claim
1. A method for setting up synchronization, with a power grid, of an inverter having a photovoltaic generator as a primary energy source, comprising the steps of:
- supplying the inverter with the energy from an additional energy source connected in parallel with input terminals of the inverter, wherein the additional energy source is a DC energy source operated independent from the primary energy source,adapting frequency, phase relationship and output voltage of the inverter supplied from the additional DC energy source to frequency, phase relationship and output voltage of the power grid, andafter adaptation, connecting the primary energy source to the inverter.
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Accused Products
Abstract
A method and an apparatus for setting up synchronization, with a power grid, of an inverter having a photovoltaic generator as a primary energy source is disclosed. The inverter is supplied with the energy from an additional energy source connected in parallel with input terminals of the inverter, wherein the additional energy source is a DC energy source operated independent from the primary energy source. The frequency, phase relationship and output voltage of the inverter supplied from the additional DC energy source are matched to the frequency, phase relationship and output voltage of the power grid, whereafter the primary energy source is connected to the inverter. With this method, an inverter dimensioned for a permissible open-circuit voltage can also be used under operating conditions, without requiring modifications of the circuitry of the primary energy source.
14 Citations
15 Claims
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1. A method for setting up synchronization, with a power grid, of an inverter having a photovoltaic generator as a primary energy source, comprising the steps of:
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supplying the inverter with the energy from an additional energy source connected in parallel with input terminals of the inverter, wherein the additional energy source is a DC energy source operated independent from the primary energy source, adapting frequency, phase relationship and output voltage of the inverter supplied from the additional DC energy source to frequency, phase relationship and output voltage of the power grid, and after adaptation, connecting the primary energy source to the inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for setting up synchronization, with a power grid, of an inverter having a photovoltaic generator as a primary energy source, the apparatus comprising:
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a plurality of photovoltaic modules representing a primary energy source, an inverter having input terminals and output terminals, the input terminals connected to the plurality of photovoltaic modules supplying a DC input voltage and a DC input current to the input terminals, an additional DC current source configured for parallel connection with the input terminals of the inverter, a control device which controls with the additional DC current source an output voltage at the output terminals of the inverter, until frequency, phase relationship and voltage of the power grid is present at the output terminals of the inverter, and a switch configured to connect the output terminals of the inverter to the power grid. - View Dependent Claims (14, 15)
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Specification